John Perkovich vs. Wayne Rosenthal — Career Comparison

On the career pitching numbers, Wayne Rosenthal posted a stronger line than John Perkovich. Wayne Rosenthal posted stronger numbers in ERA (5.4 vs 7.2) and home runs allowed (1.2 per nine innings vs 5.4). By the career numbers, Wayne Rosenthal had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.